JP3034891B2 - Image display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an image display device.

(Prior art) Conventionally, an image display device that generally displays an image input from an ITV camera in a window on a workstation simply displays an image captured by the ITV camera in a window on the workstation as it is. there were.

(Problems to be solved by the invention) However, in such a conventional image display device, IT
When displaying the image input from the V camera in a window on the workstation, the area of the scene that can be input by the ITV camera is limited by the focal length. Even when scrolling, the image data for the portion beyond the scene area that can be input by the ITV camera could not be input and could not be displayed.

For this reason, in the field of surveillance work and teleexistence, there has been a problem that it is not possible to respond to a request to look a little beside a displayed scene or a request to enlarge a display area.

The present invention has been made to solve such a conventional problem, and appropriate image information can be sequentially input from an imaging unit and displayed in a window in accordance with enlargement of a window size or scrolling of an image inside the window. So that the imaging means and the image display window can be controlled,
It is an object of the present invention to provide an image display device that is useful for monitoring work, telexistence, and the like.

[Structure of the Invention] (Means for Solving the Problems) An image display device according to the present invention includes: an imaging unit that obtains an image by shooting; an image display unit that displays an input image;
A window setting unit for setting a window for displaying an image obtained by the image pickup unit on the image display unit; and an instruction to change the window on the image display unit when there is an instruction to change the window by the instruction. Imaging control means for controlling a tilt angle or a pan angle of the imaging means to obtain a new area image corresponding to an area; Image processing means for performing processing necessary for display in the changed window on the display means on the image, and central control processing means for giving an instruction to change the window of the image display means. It is characterized by comprising.

(Operation) As described above, the image display device according to the present invention includes the central control processing means for giving an instruction to change the window of the image display means, and the imaging control means takes an image in response to the instruction to change the window from the central control processing means. In addition to controlling the means, the obtained new area image is processed by the image processing means and displayed in the window.

Therefore, even if the focal length of the image pickup means such as an ITV camera is fixed and the viewing angle is limited, the image pickup control means may issue an instruction from the central control processing means for a portion beyond the input scene area up to that point. Since control is performed to obtain a captured image, an image whose display area has been changed can be displayed on a window.

As a result, the imaging target range displayed in the window is expanded, and the use in the field of so-called surveillance and telexistence can be expanded.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an image display device according to an embodiment of the present invention. In the image display device of this embodiment, an ITV camera 1 as an imaging unit and an ITV camera 1
An image memory 2 for storing an image input by the camera, a camera platform 3 for controlling a tilt angle and a pan angle of the ITV camera 1,
An image synthesizing unit 6 as an image processing means for synthesizing the image in the image memory 2 and the image in the display memory 4 using the information of the window position / size calculating unit 5, and control of the tilt angle and pan angle of the camera platform 3 A rotation calculating unit 7 for calculating the amount.

Further, a workstation 9 is provided as a central control processing means for displaying the display memory 4 by cutting a window on the screen of the console 8 and interactively specifying the position and size of the window.

Next, the operation of the image display device having the above configuration will be described.

Since the area of the image that can be captured and input by the ITV camera 1 at a time is limited by the viewing angle of the camera, in order to display a wide area on the window, it is necessary to move the ITV camera 1 and input a plurality of rice images. Must be synthesized.

For example, it is assumed that the window W1 cut in the screen 10 of the console 8 in FIG. 2 displays an image obtained by capturing the direction in which the ITV camera 1 is currently facing. Therefore, if this window is expanded to W2, it will be free space
An image for filling the areas w21, w22, and w23 is required.
However, at the current camera position, only the image of the portion corresponding to the window W1 can be input. Therefore, it is necessary to sequentially move the ITV camera 1 to input the image of the portion corresponding to the regions w21, w22, and w23, and combine them. .

For this purpose, the window position / size calculation unit 5 receives information on the window expansion operation performed on the workstation 9 and obtains an area where a new image must be input. Then, the rotation angle calculator 7 calculates the tilt angle ψ and pan angle φ of the camera necessary to capture the direction from the center position of each of the areas w21, w22, and w23, and sends the angles to the camera platform 3 to obtain the ITV. Move camera 1.

The focal length of the ITV camera 1 to be used and the one on the window
If the conversion value of the size of the pixel on the imaging surface and the position of the center of the image are known, from the center position of the window on the console 8 and the relationship shown in FIG. can get.

Here, f is the focal length, lx, ly is the horizontal and vertical distance between the center position of the window and the center position of the image on the screen 10 of the console 8 of the workstation 9 on the imaging screen using the conversion values. It is a value obtained by converting to distance.

The camera platform 3 rotates the ITV camera 1 in accordance with the thus obtained values of the tilt angle ψ and the pan angle φ, and the captured image is stored in the image memory 2. Snap into place above. Since the position and size to be fitted are obtained from the window position / size calculation unit 5, the image synthesis unit 6 can use this information to cut out only an image of a necessary part from the image memory 2.

Such processing is performed for all the image input areas obtained by the window position / size calculation unit 5 to embed the images in the empty areas on the display memory 4, and the created images are transferred to the console 8 on the workstation 9. Screen 10
Write to the specified window.

The window size can be fixed at W, and the image inside the window can be scrolled and displayed. In this case, the image must be newly input in the same manner as when the window is enlarged. An area in the window W is obtained, the camera head 3 is controlled, an image of the portion is input, and displayed in the window W.

Further, in the above embodiment, one ITV camera 1 is rotated to input an image of a necessary scene. However, a plurality of ITV cameras are prepared so that surrounding scenes can be completely input. If arranged, the rotation angle calculation unit 7
Instead of rotating the camera platform 3 based on the information and inputting an image, the window position / size calculation unit 5 obtains a necessary portion from the images input by the individual ITV cameras and combines them. The same processing as described above can be realized. In this case, since the ITV camera can continuously input all the surrounding scenes in real time, a moving image can be displayed.

Furthermore, this apparatus can cope with an instruction to rotate the image in the window by rotating the roll angle of the ITV camera 1 by the same angle as the rotation angle and inputting the image.

In addition, if the ITV camera 1 is provided with a zoom function, it is possible to enlarge and display the gaze area portion by capturing an image by zooming, thereby displaying the scene in a distant view and paying attention. It is possible to enlarge and monitor only a part.

In addition, the resolution of the displayed image can be changed by sampling and synthesizing the image data from the image memory 2 by the image synthesizing unit 6. As a result, only the gaze area in the coarsely displayed scene can be densely displayed and enhanced by increasing the resolution.

[Effects of the Invention] As described above, according to the present invention, on the image display means,
Even if the image display window is enlarged or the image inside the window is scrolled, it is newly required by controlling the tilt angle and the pan angle of the imaging unit or by arranging a plurality of cameras. Image data can be input. Therefore, even if the size of the window displaying the input image is enlarged or the image in the window is freely scrolled, a part of the display image is not lost, and a wide area scene is displayed without dropping on the window. It can be used effectively in the field of surveillance and teleexistence.

In addition, the gaze area in the display image can be emphasized by enlarging the gaze area by the zoom function or increasing the resolution by the resolution adjustment function, and should be watched together with the overall situation of the image area imaged by the imaging means. It is possible to grasp the area in detail.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of one embodiment of the present invention, FIG. 2 is an explanatory diagram of a window display mode in the above embodiment, and FIG. 3 is a method for obtaining a tilt angle and a pan angle of an ITV camera in the above embodiment. It is an explanatory view for explaining. DESCRIPTION OF SYMBOLS 1 ... ITV camera, 2 ... Image memory 3 ... Camera head, 4 ... Display memory 5 ... Window position / size calculation unit 6 ... Image synthesis unit, 7 ... Rotation angle calculation unit 8 ... Console 9 Workstation 10 Screen W1, W2 Window w21, w22, w23 Free space

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshinori Kuno 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture Inside of Toshiba Research Institute (72) Inventor Hiroshi Mizoguchi 1 Komukai Toshiba-cho, Kochi-ku, Kawasaki-shi, Kanagawa Inside Toshiba Research Institute (72) Inventor Kyoichi Okamoto 1 Koko Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture Inside Toshiba Research Institute (72) Inventor Hiroaki Kubota 1 Komukai Toshiba-cho, Kochi-ku, Kawasaki-shi, Kanagawa Toshiba Corporation Within the Research Institute (72) Inventor Kazuhiro Fukui 1 Toshiba-cho, Komukai, Koyuki-ku, Kawasaki-shi, Kanagawa Prefecture (56) References JP-A-2-5690 (JP, A) JP-A-64-81587 ( JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G06T 1/00 H04N 7/18

Claims (6)

(57) [Claims] 1. An image pickup means for obtaining an image by photographing, an image display means for displaying an input image, and a window setting for setting a window for displaying an image obtained by the image pickup means on the image display means. Means for changing a window on the image display means, and obtaining a new area image corresponding to a change area of the window according to the instruction. Pan) imaging control means for controlling an angle; and processing necessary for displaying the new area image obtained by the imaging means in the changed window on the image display means. An image display device comprising: image processing means for performing; and central control processing means for giving an instruction to change a window of the image display means. 2. A new image to be displayed on the window by the imaging control means controlling the imaging means based on an instruction to scroll the image in the window from the central control processing means. 2. The image display device according to claim 1, wherein the image is processed by the image processing means to scroll and display the original image to a new image in the window. 3. A plurality of image pickup means are used to simultaneously obtain an image at a predetermined position and an image around the predetermined position, and based on a window enlargement instruction from the central control processing means,
2. The image display device according to claim 1, wherein the image processing means processes images from the plurality of imaging means to display an image corresponding to a vacant area of the enlarged window. 4. A plurality of image pickup means are used to simultaneously obtain an image at a predetermined position and an image around the image pickup means, and said image pickup means is provided based on an instruction to scroll an image in a window from said central control processing means. 2. The image display apparatus according to claim 1, wherein a processing unit processes the images from the plurality of imaging units and causes the window to scroll and display an original image to a new image. 5. The image pickup means includes a zoom mechanism, and the image pickup control means controls a tilt angle or a pan angle of the image pickup means and performs zooming control based on an enlargement display instruction from the central control processing means, and performs a predetermined operation. 2. The image display apparatus according to claim 1, wherein an enlarged image of the position is captured, and the image processing unit processes the enlarged image from the imaging unit and displays the processed image on the window. 6. The image processing means has a resolution adjusting function and, based on a resolution increase instruction from the central control processing means, sets a predetermined portion of an image from the image pickup means to have a higher resolution than other portions. 2. The image display device according to claim 1, wherein the image is displayed simultaneously on a window.